zircon/system/core/netsvc/debug-command-enabled.cpp

// Copyright 2019 The Fuchsia Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "netsvc.h"

#include <stdio.h>

#include <lib/fdio/io.h>
#include <lib/fdio/spawn.h>
#include <zircon/processargs.h>
#include <zircon/syscalls.h>

static void run_program(const char* progname, const char** argv, zx_handle_t h) {
    zx_handle_t logger = ZX_HANDLE_INVALID;
    zx_debuglog_create(ZX_HANDLE_INVALID, 0, &logger);

    fdio_spawn_action_t actions[] = {
        {.action = FDIO_SPAWN_ACTION_SET_NAME, .name = {.data = progname}},
        {.action = FDIO_SPAWN_ACTION_ADD_HANDLE,
         .h = {.id = PA_HND(PA_FD, 0 | FDIO_FLAG_USE_FOR_STDIO), .handle = logger}},
        {.action = FDIO_SPAWN_ACTION_ADD_HANDLE, .h = {.id = PA_HND(PA_USER0, 0), .handle = h}},
    };

    size_t action_count = (h == ZX_HANDLE_INVALID) ? 2 : 3;
    uint32_t flags = FDIO_SPAWN_CLONE_ALL & ~FDIO_SPAWN_CLONE_STDIO;
    char err_msg[FDIO_SPAWN_ERR_MSG_MAX_LENGTH];

    zx_status_t status = fdio_spawn_etc(ZX_HANDLE_INVALID, flags, argv[0], argv, NULL, action_count,
                                        actions, NULL, err_msg);

    if (status != ZX_OK) {
        printf("netsvc: cannot launch %s: %d: %s\n", argv[0], status, err_msg);
    }
}

void netboot_run_cmd(const char* cmd) {
    const char* argv[] = {"/boot/bin/sh", "-c", cmd, NULL};
    printf("net cmd: %s\n", cmd);
    run_program("net:sh", argv, ZX_HANDLE_INVALID);
}